A group of scientists conducted an experiment with 5 monkeys and a ladder with bananas at the top. Any time a monkey climbed the ladder, all the monkeys were sprayed with cold water. Eventually, the monkeys formed a behavior where any monkey that tried to climb the ladder would be beaten by the others. Even when monkeys were replaced, this behavior continued without the monkeys ever experiencing the cold water punishment themselves. The document suggests this shows how behaviors are passed down within groups without full understanding of the original reasons.